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How can I get the intersection, union, and subset of arrays in Ruby?
...s by doing &(intersection), -(difference), and |(union).
Obviously I didn't implement the MultiSet to spec, but this should get you started:
class MultiSet
attr_accessor :set
def initialize(set)
@set = set
end
# intersection
def &(other)
@set & other.set
end
# dif...
How do I revert master branch to a tag in git?
...o cat ~/diff.patch | git apply, it tells me error: unrecognized input. Any idea? @NitinBansal perhaps since you commented recently?
– Experience111
Jun 18 at 10:16
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Why should I use Restify?
...ooking for a more light-weight framework than express.js which probably avoids the unwanted features and would act like a custom-built framework for building REST APIs. Restify from its intro is recommended for the same case.
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How can I extract a good quality JPEG image from a video file with ffmpeg?
... -i input.mp4 -qscale:v 4 -frames:v 1 output.jpg
This will work with any video input. See below if your input is MJPEG.
MJPEG
If your input is MJPEG (Motion JPEG) then the images can be extracted without any quality loss.
The ffmpeg or ffprobe console output can tell you if your input is MJPEG:
$ ...
XPath to select multiple tags
...
That is super. Where did you come up with that?
– Keith Tyler
Jan 10 '19 at 2:42
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CSS3 gradient background set on body doesn't stretch but instead repeats?
ok say the content inside the <body> totals 300px high.
12 Answers
12
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Extract substring using regexp in plain bash
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Thanks for the detailed explanation, helps to avoid future "how do I regexp XXXX" posts.
– studgeek
Feb 8 '17 at 20:23
4
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How can you escape the @ character in javadoc?
How can I escape the @ symbol in javadoc? I am trying to use it inside a {@code} tag, which is inside <pre> tags.
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Compare if BigDecimal is greater than zero
... scale (e.g. it evaluates to 0.00 instead of 0). You probably want to consider that it's equal to zero. The compareTo() method will indeed do this. But the equals() method will not. (Another proof, if any were needed, that Loki or one of his avatars is alive and well and has moved into software de...
Is type=“text/css” necessary in a tag?
...type of the linked resource. It is purely advisory. The value must be a valid MIME type string.
For external resource links, the type attribute is used as a hint to user agents...
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